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A122593 a(n) = 2*a(n - 1) - a(n - 2) - (a(n - 2) - a(n - 1))^2 + (a(n - 2) - a(n - 3))^2. 0
1, 1, 1, 0, 0, 2, -6, -54, -2184, -4532418, -20523011025492, -421193795514716517978851412, -177404213380075544048510970681865493733941889439557930, -31472254925003374689403264185693337773848906235022202710045975235073779744728 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

a[0] = 1; a[1] = 1; a[2] = 1; a[n_] := a[n] = a[n - 1] - 2*a[n - 1] + a[n - 3]- (a[n - 2] - a[n - 1])^2 + (a[n - 2] - a[n - 3])^2; Table[a[n], {n, 0, 17}]

CROSSREFS

Sequence in context: A152543 A279454 A306021 * A267348 A264610 A153450

Adjacent sequences:  A122590 A122591 A122592 * A122594 A122595 A122596

KEYWORD

sign

AUTHOR

Roger L. Bagula, Sep 19 2006

EXTENSIONS

Edited by N. J. A. Sloane, Sep 21 2006

STATUS

approved

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Last modified April 11 06:40 EDT 2021. Contains 342886 sequences. (Running on oeis4.)